3A95.59 - Belousov - Zhabotinsky Reactions

Code Number:
Demo Title:
Belousov - Zhabotinsky Reactions
Chaotic Patterns - Initial Conditions
Area of Study:
Sodium Bromate, Malonic Acid, Potassium Bromide, Cerium (IV) Ammonium Nitrate, Sulfuric Acid, Ferroin Indicator, Distilled Water, Beakers, Petri Dishes, Stirring Rods.

See also 3A95.59 in Oscillations/Acoustics.

The simple reaction directions are in the box.  Do not make more that 100 mls of each of the A, B, and C stock solutions for final demo mixing as there is some gas evolution during the reaction/digestion process.  40 mls of each stock solution mixed for the final demo seems to work very well.  Add 1 ml or the starch solution.

The more involved chemical reaction is as follows:  The mixing of chemicals needs to take place before hand.  This also take quite a bit of time, so make sure to allow at least 24 hours to get this demo ready.  Refer to the file for chemical proportions and mixing instructions.

For every 100 ml of solution use:

0.33g Malonic Acid
0.95g NaBrO3
0.55g Ceric Ammonium Nitrate
4.5 ml H2SO4

**For the KBr make a stock solution using .2 grams KBr per Liter.  Use 1 ml of this solution for each 100 ml of reaction solution.

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